It is posible for an article to be worse than nothing.
geni
And that's not some theoretical possibility - that's everyday reality. Deleting all the contents of [[Category:Articles that need to be wikified]] would arguably improve the encyclopedia. There would be *some* worthwhile stuff deleted, though, and the fallout would hurt the community, which in turn would hurt the encyclopedia. So don't stuff that bean up your nose you IAR-admins! :)
Regards, Haukur